水声网络是实现对海洋资源开发和利用的重要网络基础设施，是实现我国海洋强国的基本保障。在水声网络中，低时延、高可靠的端到端路由是广域分布的水下平台实现互联互通的关键。面向水声网络中信号传播时延长、信道可靠性差且时变导致的端到端路由效率低的难题,本项目聚焦利用长传播时延和网络资源灵巧组合提高网络端到端路由性能的理论和方法。通过建立面向长传播时延-信道高误码-网络吞吐量之间的数学关系，揭示长传播时延对端到端传输效能的影响机理，提出利用长传播时延提高网络性能的方法；并探索多样网络资源的灵巧组合来适应复杂动态水下环境的理论模型与方法，揭示面向复杂动态水下环境的路由控制机理，形成水声网络自适应路由方法，提高网络对动态水下环境的适应能力。

The underwater acoustic networks (UANs) has been considered as an essential infrastructure for ocean exploitation and utilization，and the basic platform guarantee for building an ocean power in China. In UANs, the high reliability and low latency routing techniques is the key to the interconnection of wide-area underwater platforms. To the problem of low end-to-end routing efficiency caused by the long propagation delay, unreliability and time variable channel conditions, this project focuses on the theory and methods of exploring long propagation delay and network resource dexterity to improve the end-to-end routing performance. By establishing the mathematical relationship among long propagation delay-high channel error-network throughput, the mechanism of the effect of long propagation delay on end-to-end transmission efficiency is revealed, and the methods of exploring long-propagation delay to improve network performance is proposed. This project also puts forward the theoretical model and methods of adapting the complex dynamic underwater environment by using a clever combination of dexterity network resources, reveals the routing control mechanism in complex dynamic underwater environment, and forms the adaptive routing method to improve the adaptability of UANs in dynamic underwater environment.